Abstract
To explain a series of experimental data concerning low carbon, high manganese, microalloyed structural steels, a theory of cleavage fracture is presented, based on the assumption that cleavage initiation can occur in the ferrite lattice at the intersection of two slip bands, in the absence of brittle phases. The crack extension force acting on the propagating microcrack is controlled by the grain diameter d which, accordingly, is the microstructural parameter determining the tendency of the material to fracture. The cleavage fracture stress σcf is found to be strongly influenced by the amount of blunting produced during the stage of subcritical crack growth. Taking this effect into account, σcf is shown to depend on grain diameter according to a law of the type d−p, where p is close to 1/4.
MST/1667
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References
1.
GRAY
J. M.
: in Proc. 14th Mech. Work. Steel Process. Conf., Chicago, IL , 1972 , p. 174 .
2.
LAUPRECHT
W. E.
,
IMGRUND
H.
, and
COLDREN
R
Stahl Eisen , 1973 , 93 , 1041 .
3.
OUCHI
C.
,
OKITA
T.
, and
YAMAMOTO
S.
Trans. Iron Steel inst. Jpn , 1982 , 22 , 608 .
4.
GRAY
J. M.
and
PONTREMOLI
M.
:in Proc. Int. Conf. on ‘Pipeline technology’, Rome, November 1987 , Associazione Italiana di Metallurgia.
5.
PONTREMOLI
M.
,
CERQUITELLA
A.
,
COLLELUORI
D.
,
PETRUCCI
M.
, and
IANNONE
c.
Proc. Int. Conf. ‘OMAE ‘90’, Houston, TX, February, 1990 .
6.
BROZZO
P.
,
CAPURRO
M.
,
PERIPIMENO
B.
, and
STAGNO
E.
Prakt. Metallogr. , 1992 , 29 , 414 .
7.
CURRY
D. A.
: in ‘Micromechanisms of crack extension’, (Conf. Preprints), Cambridge, March-April, 1980 , The Metals Society, Paper 4 .
8.
HAHN
G. T.
: Metall. Trans. , 1984 , 15A , 947 .
9.
XU
X. X.
,
CAI
Q. G.
,
SU
Y.
,
Hou
C. X.
, and
MA
W. D.
Mater. Sci. TechnoL , 1989 , 5 , (9 ), 913 .
10.
DAVIS
C. L.
and
KING
J. E.
Mater. Sci. TechnoL , 1993 , 9 , (1 ), 8 .
11.
GRIFFITHS
J. R.
and
OWEN
D. R. J.
J. Mech. Phys. Solids , 1971 , 19 , 419 .
12.
BROZZO
P.
and
BUZZICHELLT
G.
in Proc. Conf. on ‘Analytical and experimental fracture mechanics’, June 1980 , Italsider/ Lehigh University, p. 45 .
13.
PETCH
N. J.
: Acta Metall. , 1986 , 34 , 1387 .
14.
SMITH
E.
: in Proc. Conf. on ‘Physical basis of yield and fracture’, Oxford, 1966 , The Institute of Physics/The Physics Society, p. 36 .
15.
GERBERICH
W. W.
,
CHEN
Y. T.
,
ATTERIDGE
D. G.
, and
JOHNSON
T.
Acta Metall. , 1981 , 29 , 1187 .
16.
CURRY
D. A.
and
KNOTT
J. F.
Met. Sci. , 1978 , 12 , 511 .
17.
FETCH
N. J.
and
WRIGHT
E.
Proc. R. Soc. , 1980 , A370 , 29.
18.
COTTRELL
A. H.
: in ‘Yield, flow and fracture of polycrystals’, (ed.
Baker
T. N.
)123 ; 1983 , New York , Applied Science .
19.
COTTRELL
A. H.
: Trans. AIME , 1958 , 212 , 192 .
20.
STROH
A. N.
in ‘Fracture’ , (ed.
Averbach
B. L.
et al.)., 117 ; 1959 , New York , Technology Press/Wiley .
21.
PARKER
E.
: in ‘Fracture’, (ed.
Averbach
B. L.
et al.), 181 ; 1959 , New York , Technology Press/Wiley .
22.
ARGON
A. S.
and
°ROWAN
E.
:Philos. Mag. , 1964 , 9 , 1023 .
23.
STOKES
R. J.
,
JOHNSTON
T. L.
, and
LI
C. H.
Philos. Mag. , 1959 , 4 , 920.
24.
AVERBACH
B. L.
: in ‘Fracture’, Vol. 1 , (ed.
Liebowitz
H.
, 441 ; 1966 , New York , Academic Press .
25.
PARIS
P. C.
and
SIH
G. M. C.
‘Fracture toughness testing and itsapplications’, STP 381 , 30; 1965 , Philadelphia , PA, ASTM .
26.
KOLSKY
H.
and
RADER
D.
in ‘Fracture’, Vol. 1 , (ed.
Liebowitz
H.
, 533 ; 1966 , New York , Academic Press .
27.
BARENBLATT
G. I.
: Prikl. Mat. i Mech. , 1959 , 23 , 434, 706, and 893 .
28.
BARENBLATT
G. I.
Adv. Appl. Mech. , 1962 , 2 , 55.
29.
PASKIN
A.
,
MASSOUMZADEH
B.
,
SHUKLA
K.
,
SIERADZKI
K.
, and
DIENES
G. J.
Acta Metall. , 1985 , 33 , 1987 .
30.
RICE
J. R.
: J. Appl. Mech. , 1968 , 35 , 379 .
31.
CHANGCHUN
L.
,
HUIXIA
Z.
,
ZHILAN
Z.
, and
HONGCHENG
z.
Eng. Fract. Mech. , 1992 , 43 , 1009 .
32.
RICE
J. R.
and
THOMSON
R.
Philos. Mag. , 1974 , 29 , 73 .
33.
JOKL
M. L.
,
VNEK
V.
, and
McMAHON
C. J.
Jr
Acta Metall. , 1980 , 28 , 1479 .
34.
LYNCH
S. P.
: Acta Metall. , 1988 , 36 , 2639 .
35.
JOHNSTON
W. G.
and
GILMAN
J. J.
J. Appl. Phys. , 1959 , 30 , 129 .
36.
STEIN
D. E.
and
LOW
J. R.
J. Appl. Phys. , 1960 , 31 , 362 .
37.
HOAGLAND
R. G.
,
ROSENFIELD
A. R.
, and
HAHN
G. T.
Metall. Trans. , 1972 , 3 , 123 .
38.
TRUESDELL
C.
: ‘A first course in rational continuum mechanics’, Vol. 1 ; 1977 , New York , Wiley .
39.
LI
J. C. M.
: Acta Metall. , 1960 , 8 , 563 .
40.
FRANK
F. C.
: Proc. Phys. Soc. , 1949 , A62 , 131.
41.
BALDACCI
R.
,
AUGUSTI
V.
, and
CAPURRO
M.
Mem. Accad. Naz. Lincei, Cl. Sci. Fis. Matem. e Natur. , 1979 , Scr. 8 , 15 , 23 .
42.
LANDAU
L.
and
LIFCHITZ
E.
‘Théorie du champ’, 35 ; 1966 , Moscow , Mir .